Wall-socket.



j. KENNEDY.

WALL SOCKET.

APPLICATION FILED IuNE I9. 1914.

hmmm.

IIaIeHIed May 9,1916.

TSEPH KENNY, OF NEVI YORK, N. Y., ASSIIIGNOR. TO THE CLEMENTS COMPANY, OF NEW "YORK, N. Y., A CORPORATYON 0F NEW YORK.

wannsoonn'r.

Specicaton of Letters Patent.

Patented May il, 13163.

To all whom t may concern." v

Be it known that l, JOSEPH KENNEDY,1a citizen of the United States of America, and a resident of New York,.county of New York, and State of New York, have invented certain new and useful lmprovements in Wall-Sockets, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof. l

My invention relates to wall socketsior plugs such as are inserted in walls, floors or other structures of material which will not readily receive and hold the threads of a bolt, for the purpose of forming anchorage members for bolts and the like, and its object is' to provide a simple device which will be securely held in a hole in such material. More especially its object is to provide a structure of such construction that it is weakened in. certain parts so that it will split along a substantially longitudinal line or wlines when a boltor the like is driven into it.

Structures embodying this invention were disclosed in a copending application for patent, Serial No. 784,672, filed by me Aw gust 14, 1913, and this application is a con tinuation in part of said pending applicationj and whichl I have assigned to r1`he Cle ments Company, a corporation of the State of New York.

Referring to the drawings: Figure 1 is a longitudinal sectional elevation of a structure embodying my invention, and Fig. 2 is an end view thereof. Fig. 3 is a transverse section of a similar device with two grooves therein through its outer surface instead of the single groove through Ithe inner surface of the wall socket shown in Figs. 1 and 2. Fig. i is a similar section of a wall socket of slightly modified construction. ln Figs. 5 and 6 l have shown in longitudinal elevation partly in section and in end view respectively, a wall socket or plug with projecting ribs on both itsfinterior and its exterior and which is also constructed in accordance with the present invention. An other style of, wall plug which also emn bodies this invention is illustrated in longi tudinal section and end view in Figs. 7 and 8 respectively. Fig. 9 is a longitudinal sectional elevation' and Fig. 10 an end View of another modification of structure in which this `invention is present. Fig. 11 is a longitudinal sectional elevation of a still further modification of construction, and Fig. 12 1s a transverse section of the same device taken on the line 19,-12 of Fig. 11. A. longitudinal wall plug embodying this invention and having a tapered threaded in- Y terial such as lead so that when a threaded bolt or the like is screwed into it, such bolt will cut its own threads in the bore. In this shell is either a groove l1 cut longitudinally through a part or the whole of its length in the surface of'its bore, or a [similar groove 12 cut in its outer surface. It is immaterial whether there are one or more of these grooves, as their object is to so weaken the structure that when a bolt is Yforced into the bore the shell will split apart along one line, or will split apart into two or more sections, thereby permitting a relatively free expansion of the shell. It is also advantageous especially if the material of which the shell is made is stronger, to place these grooves 11 and 12 opposite and in alinement with each other as shown in Fig. 4f.

ln the structure shown in Figs. 5 and 6, the shell 10A is cylindrical but has project-l ing from its outer surface a plurality of longitudinally disposed ribs 13, and from its inner surface similarly disposed ribs 14. Lines drawn through the ends of the ribs 13 as they would appear in a transverse section would form a heXagon. Such external ribs are provided to prevent turning of the wall plug while a bolt is being forced into it and to'obtain a gripping hold upon the surface of the hole into which such a plug is driven. The internal ribs facilitate the self-thread cutting of the bolt as it is inserted and are tapered to give the desired expansive effect of the bolt to the shell. ln

this particular structure a single groove 11 is formed in the inner surface of the shell A between two of the internal ribs 14.

In some cases wall plugs may be made in 'the form illustrated in Figs. 7 'and 8, in

which the shell is designated by 10B.. This shell has a tapered bore in which is a groove 11. In 'this case the external shape of the shell is polygonal as shown at 15, but the apexes of the polygon are tapered at intervals as at 16 in a common direction to form serrations which materially aid in holding the device within the hole into which it is driven. V

The exterior of the shells may be in a sur# face the cross-section of which is a curve of non-uniform diameter. Such a shell Ais shown at 10C, Figs. 9 and'lO, and its crosssection may be in the form of an ellipse or an oval. It is obviousthat such a form resists the tendency which it has to rotate in the hole in which it is inserted,.during the insertion of a bolt. In this case the slot 11A is cut helically. These helical grooves allow'the shell to part at'the point oifering l the least resistance and results in a balance of gripping effect along the full length of-l the wall of the hole. They lalso allow the' expansion of the shell at dili'erent parts of its length, to take place in different angular directions, thereby giving a maximum holding effect.

In the 'specific form illustrated in Figs. 11

and 12, there are interrupted longitudinal ribs 14A projecting from the surface of a tapered bore. The slot l1 is cut in the inner surface of the shell and extends between the interruptedribs or lugs 14A which do not extend through the whole length of the shell. The threads of abolt readily cut themselves into 'such internal lugs if the shell is made of lead or the like.

The shell shownin Figs. 13 and 14 is provided with a tapered threaded bore, a construction which may be used with soft metal` but which is particularly desirable when a harder metal such as cast iron is' used.

I have illustrated several modifications of structure to show that this invention is applicable to many forms of `wall sockets and is capable of wide variations, and I intend only such limitations as appear in the appended claims.

What I claim is:

l. A wall socket comprising a one piece the greater part'fof the wall of said shell adapted to weakenA the shell along a' longitudmal line. e

3. A wall socket comprising a circumferentially continuous one piece hollow shell of soft metal having therein a plurality of longitudinal grooves extending through the greater portion of the wall of said shell.

4. A wall socket `com rising a one piece hollow shell having a angible annularly continuous portion and having therein a substantially longitudinal groove adapted to weaken the shell.` v

5. A wall socket comprising' a one piece hollow shell of soft metal, the inner surface of said shell being adapted t0 receive the threads of a bolt, said shell bein provided with a groove so placed as to ma (e the shell longitudinally frangible.

6. A wall socket comprising a one piece shell ofl soft metal having a longitudinally tapered bore adapted -to receive the threads of a bolt, said shell being provided with a groove so placed as to make the shell longitudinally frangible.

7. A wall socketv comprising an integral hollow shell adapted to receive a. bolt, constructed with means for weakening said shell longitudinally for a portion of its length, and integral means within said shell for receiving the threads of a bolt, said means being arrangedto cause the insertion of a" bolt to -split said shell at said weakened ortion. .Y

8. wall socket comprisingan integral shellof soft metal having a longitudinally tapered bore adapted to receive the threads of a bolt, and constructed with integral means for causing the insertion of a bolt to split said shell longitudinally.

9. A wall socket comprising a hollow onepiece shell having a helical line of weakness therein. e

10. A wall socket comprising a hollow one-piece shell having a helical groove therein adapted to weaken said shell along Ythe line of said groove.

11. A wall socket comprising an integral shell having a longitudinally tapered bore adapted to receive the threads of a bolt and provided with a helical groove for causing the insertion of a bolt to split the shell along the line of said groove.

In witness whereof, I have hereunto set my hand in thel presence of two subscribing witnesses, this th day of June, 1914.

p JOSEPH KENNEDY. Witnesses:

I. B. Moons,

I. M. MULCAY. 

